/* * Copyright (C) 1993-2002 by Darren Reed. * * See the IPFILTER.LICENCE file for details on licencing. */ /* * kmemcpy() - copies n bytes from kernel memory into user buffer. * returns 0 on success, -1 on error. */ #if defined(__sgi) && (IRIX > 602) # include #endif #include #include #include #include #include #include #include #include #ifndef __sgi #include #endif #include #include #include #include #include #include #include #include #if __FreeBSD_version >= 300000 # include #endif #include "kmem.h" #include "netinet/ip_compat.h" #include "netinet/ip_fil.h" #include "ipf.h" #ifndef __STDC__ # define const #endif #if !defined(lint) static const char sccsid[] = "@(#)kmem.c 1.4 1/12/96 (C) 1992 Darren Reed"; static const char rcsid[] = "@(#)$Id: kmem.c,v 2.2.2.16 2002/12/06 11:40:27 darrenr Exp $"; #endif #ifdef __sgi typedef int kvm_t; static int kvm_fd = -1; static char *kvm_errstr; kvm_t *kvm_open(kernel, core, swap, mode, errstr) char *kernel, *core, *swap; int mode; char *errstr; { kvm_errstr = errstr; if (core == NULL) core = "/dev/kmem"; kvm_fd = open(core, mode); return (kvm_fd >= 0) ? (kvm_t *)&kvm_fd : NULL; } int kvm_read(kvm, pos, buffer, size) kvm_t *kvm; u_long pos; char *buffer; size_t size; { size_t left; char *bufp; int r; if (lseek(*kvm, pos, 0) == -1) { fprintf(stderr, "%s", kvm_errstr); perror("lseek"); return -1; } for (bufp = buffer, left = size; left > 0; bufp += r, left -= r) { r = read(*kvm, bufp, 1); if (r <= 0) return -1; } return size; } #endif static kvm_t *kvm_f = NULL; int openkmem(kern, core) char *kern, *core; { union { int ui; kvm_t *uk; } k; kvm_f = kvm_open(kern, core, NULL, O_RDONLY, ""); if (kvm_f == NULL) { perror("openkmem:open"); return -1; } k.uk = kvm_f; return k.ui; } int kmemcpy(buf, pos, n) register char *buf; long pos; register int n; { register int r; if (!n) return 0; if (kvm_f == NULL) if (openkmem(NULL, NULL) == -1) return -1; while ((r = kvm_read(kvm_f, pos, buf, (size_t)n)) < n) if (r <= 0) { fprintf(stderr, "pos=0x%x ", (u_int)pos); perror("kmemcpy:read"); return -1; } else { buf += r; pos += r; n -= r; } return 0; } int kstrncpy(buf, pos, n) register char *buf; long pos; register int n; { register int r; if (!n) return 0; if (kvm_f == NULL) if (openkmem(NULL, NULL) == -1) return -1; while (n > 0) { r = kvm_read(kvm_f, pos, buf, (size_t)1); if (r <= 0) { fprintf(stderr, "pos=0x%x ", (u_int)pos); perror("kstrncpy:read"); return -1; } else { if (*buf == '\0') break; buf++; pos++; n--; } } return 0; } /* * Given a pointer to an interface in the kernel, return a pointer to a * string which is the interface name. */ char *getifname(ptr) void *ptr; { #if SOLARIS char *ifname; ill_t ill; if (ptr == (void *)-1) return "!"; if (ptr == NULL) return "-"; if (kmemcpy((char *)&ill, (u_long)ptr, sizeof(ill)) == -1) return "X"; ifname = malloc(ill.ill_name_length + 1); if (kmemcpy(ifname, (u_long)ill.ill_name, ill.ill_name_length) == -1) return "X"; return ifname; #else # if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \ defined(__OpenBSD__) #else char buf[32]; int len; # endif struct ifnet netif; if (ptr == (void *)-1) return "!"; if (ptr == NULL) return "-"; if (kmemcpy((char *)&netif, (u_long)ptr, sizeof(netif)) == -1) return "X"; # if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \ defined(__OpenBSD__) return strdup(netif.if_xname); # else if (kstrncpy(buf, (u_long)netif.if_name, sizeof(buf)) == -1) return "X"; if (netif.if_unit < 10) len = 2; else if (netif.if_unit < 1000) len = 3; else if (netif.if_unit < 10000) len = 4; else len = 5; buf[sizeof(buf) - len] = '\0'; sprintf(buf + strlen(buf), "%d", netif.if_unit % 10000); return strdup(buf); # endif #endif }